title: 3,4-Bis[1-(prop-2-yn-yl)-1H-indol-3-yl]-1H-pyrrole-2,5-dione.
abstract: In the title mol-ecule, C26H17N3O2, both indole ring systems are essentially planar, with maximum deviations of 0.019 (2) and 0.033 (1) Å for the N atoms, and form dihedral angles of 34.40 (9) and 45.06 (8)° with the essentially planar pyrrole ring [maximum deviation = 0.020 (2) Å]. The dihedral angle between the two indole ring systems is 58.78 (6)°. In the crystal, mol-ecules are connected by pairs of N-H⋯O hydrogen bonds, forming inversion dimers and generating R 2 (2)(8) rings. Weak π-π stacking inter-actions, with a centroid-centroid distance of 3.983 (2) Å, are also observed.
authors.affiliation: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
authors.forename: Mu-Hua
authors.initials: MH
authors.lastname: Huang
authors.forename: Yong-Chen
authors.initials: YC
authors.lastname: Gao
authors.forename: Feng-Ling
authors.initials: FL
authors.lastname: Yang
authors.forename: Yun-Jun
authors.initials: YJ
authors.lastname: Luo